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Tube Mill Internals

Tube Mill Internals are the several items equipped in a HIS or tube mill, which include an inlet wall at its entrance, liner (to protect its shell and give the media charge the requested effect), a diaphragm and an outlet wall at its end. A tube or horizontal mill is a cylindrical tube positioned horizontally on two supports and rotating. It can have different dimensions and operating parametersto suit the particular application they are designed for.

The role of Feed endLiners is to protect the mill heads against wear. They must also offer the longest possible lifetime. Their application is based on the principle of protection of the flange and design to avoid any projection of balls on the linings.

Lifting Liners are used to prolong the service life of the mills, reduce the wear rate of the grinding balls and reduce the power consumption and maintenance requirements. Various systems of Lifting Liners are used, depending on the application requirements of the end user, namely, Bolted, Semi-Bolted and Vaulted effects.

Coolers in the Cement plants are key installations as they allow heat recovery from the Clinker to the Kiln and the Preheater and ensure an optimum clinker temperature that will allow easy handling and storage. This results in Cooler Grates being strategic elements in the Cooler. Their working conditions may be put to the test considering the tendency to often push the kilns towards higher outputs than the design ones as well as the possibility of unstable working conditions due to the use of alternative fuels.

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